Utility Grid and Microgrid

Energy production from renewables such as solar and wind will more than double over the next five years while traditional generation sources including thermal-based coal and nuclear are in sunset phase. The electric grid is now being reborn with clean, renewable generation.

Utilities and asset owners are faced with the challenge of integrating these new resources to ensure reliability and power quality required by customers, governmental regulatory bodies and global standards. The most cost-effective and reliable energy storage methods are needed to ensure that the technical and business cases are met while ratepayers benefit from a low carbon future.

Maxwell Technologies is enabling our sustainable energy future by delivering new levels of power quality and reliability to meet the needs of the modern grid with attractive cost and proven long asset life. Our ultracapacitor (supercapacitor) based energy storage systems, deployed as stand-alone systems or integrated with batteries, meet the rigorous requirements of voltage and power quality applications in grids and microgrids. Maxwell works directly with major utility equipment OEMs, your preferred energy storage suppliers, and system integrators to deliver optimized solutions based on specific technical project needs that ensure higher performance, lower cost, and longer lifetime.

Explore our value in grids and microgrids

Maxwell’s grid energy storage systems can be integrated and sited at renewable power plants, substations, distribution feeders, transmission lines, "must operate" manufacturing facilities, commercial and industrial sites, microgrids, and isolated microgrids/minigrids in remote areas to provide the following:

Solar and Wind Power Smoothing
Mitigate msec-sec timeframe power fluctuations to ensure local power quality, especially on long feeders or with a high penetration of renewable energy. Enable interconnection of more renewable projects which would otherwise require costly infrastructure investment.

Mission Critical Microgrids and Facilities
Maxwell ultracapacitors are deployed as a stand-alone asset or integrated with batteries to provide near real time frequency, voltage and power firming and smoothing in island mode. These devices meet the most demanding transient and pulsed power loads and provide the highest level of availability and reliability in support of utility microgrids, commercial and industrial microgrids, campuses and industrial parks, and critical assets including defense and military microgrids.

Voltage Sag Mitigation and UPS
In utility grids and microgrids, Maxwell ultracapacitors provide voltage, frequency and power stabilization in near real time. Fast responding, transient response capability mitigates deep and/or recurring power sags from cycles to minutes. In manufacturing and C&I facilities, ensure delivered power meets ANSI, CBEMA and SEMI standards for continuous operations and to mitigate risk of financial loss. Systems can be sited on utility side or customer side-of-meter and occupy a significantly smaller footprint providing faster response than alternative battery and generator solutions.

Primary Frequency Response
Renewables do not provide the necessary inertia and short circuit power to the power system. Maxwell ultracapacitors provide fast frequency response (FFR) as a stand-alone system or integrated with batteries. Fast, reliable cycles-sub-second timeframe response for synthetic inertia can also be provided when integrating with SVC/STATCOM or as a replacement to SYNCON. Enable interconnection of assets such as PV and wind; stabilize voltage and frequency while replacing the system inertia deficit due to retired fossil and nuclear generation plants. Energy storage provides fast response to mitigate, in near real time, a decrease in generation, generation-load imbalance and unpredictable variations in demand.

Generator Bridging, Ramping and Regulation
Maxwell ultracapacitors provide controlled ramp rates from cycles-to-seconds-to-minutes until generator ramp is complete. Reduce the need for idling resources and reduce fuel consumption. Fast responding ultracapacitor energy storage reacts to an increase or decrease in generation (or load) and to markets or random, unpredictable variations in demand.

Hybrid Storage – Asset Optimization and Stacked Services
New levels of stacked functionality are now achieved by integrating traditional Li-ion and other battery chemistries with ultracapacitors. Capacity, peak load management, energy arbitrage, near real time voltage and frequency stabilization and regulation, FFR (fast frequency response), synthetic inertia, bridging, and ramping can be combined in one system to maximize asset use, increase benefit-to-cost ratio and decrease payback period. Contact us and we will show you how.

From microgrids to utility grids, we deliver reliable, safe, and high performance energy storage

Utility Scale Energy Storage

  • Scalable in utility scale MWs
  • Standard configuration with utility grade communications and monitoring

Configurable Grid Cell Pack

  • Scalable for microgrids and manufacturing facilities
  • Highly configurable and customizable building block with advanced cell management system

Maxwell industry leadership in grid

Ultra-fast Response

Sub-cycle response times, high cycling capability (up to 1 million cycles)*

Proven to Last

15-year lifetime typical; Demonstrated performance with over 3 million cumulative hours of product testing

Quality and Durability

Provides unmatched quality due to Maxwell’s unique electrode manufacturing process

$/kW Savings

Optimized cost and for high power applications, stand-alone or with other storage

Design Leadership

Products designed with leading OEMs, experienced systems architecture, advanced modeling and simulation

Best-in-Class Partnerships

We collaborate with proven, bankable Tier 1 power electronics providers with proven track record

Contact Us

Established in 1965, Maxwell Technologies has been a trusted supplier of high-tech energy solutions for customers worldwide. Over the past 20 years, system designers across industries have leveraged the power and speed of Maxwell’s ultracapacitor cell technology. Maxwell’s quality and proven field reliability is evidenced in the over 8 million devices provided to grid applications and 65 million ultracapacitors deployed in systems for automotive, heavy transportation, renewable energy and industrial applications.

Contact us using the form below and let us know how you would like to proceed.


Safety, operation and performance of gridconnected energy storage systems
Decarb Europe
Connecting technologies for a cleaner future

In the Media

Hybridizing Energy and Power for the Grid
Energy Storage Journal, page 23
Pure-Play Battery or Hybrid Grid Energy Storage?
Energy Storage News
A Hybrid Approach to Energy Storage
Electronic Design


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*Results may vary. Additional terms and conditions, including the limited warranty, apply at the time of purchase. See the warranty details and enclosed information for applicable operating and use requirements.